The e-invoice mandatory in Spain enters its final phase. This occurs with the publication as a Royal Decree of the new draft of the Ministerial Order which marks the turning point many companies were waiting for. It specifies technical aspects, deadlines, and requirements that directly affect companies’ financial processes.
For CFOs and financial managers, the moment is critical. In addition to complying with this e-invoicing mandate, they must adapt systems, processes, and fiscal architecture, if they haven’t already. Let’s see what this Ministerial Order entails, when it will be mandatory, and how to prepare.
From the ‘Crea y Crece’ Law to the Ministerial Order on mandatory e-invoicing
The mandatory nature of e-invoicing originates from the ‘Crea y Crece’ Law, whose objective is to reduce late payments and digitize B2B commercial relationships. However, until now, the technical development enabling its real application was missing.
Chronologically, the most important legal milestones have been:
- ‘Crea y Crece’ Law (2022), which introduced the obligation.
- Royal Decree (March 31, 2026), which regulates the general framework.
- Draft Ministerial Order (April 2026), which defines technical and operational requirements.
This new draft, currently under public consultation (from April 17 to May 8), details basic aspects for e-invoicing, such as:
- Interoperability between platforms.
- Exchange systems.
- Traceability requirements.
When will e-invoicing be mandatory?
According to the current framework, the Ministerial Order will mark the start of the deadlines on October 1, 2026 (after its definitive approval). From that date, adaptation periods will be activated based on the company’s size.
Timeline forecast for mandatory e-invoice implementation
Therefore, these deadlines require that:
- Large companies are prepared by 2027.
- The rest of the business sector is ready by 2028
For international companies, these deadlines are very demanding due to the complexity of their financial systems.
Key technical aspects of the Ministerial Order
The approved draft introduces several technical requirements for e-invoicing that directly impact billing and ERP systems.
1. Mandatory interoperability
One of the most important points is the obligation for all e-invoicing platforms to be interoperable. This means they must offer:
- Ability to send and receive invoices between different technology providers.
- Use of common standards.
- Elimination of closed ecosystems.
2. Invoice status tracking
The obligation to report on invoice status: issued, received, accepted, rejected, or paid. Something with a direct impact on three areas:
- Cash flow management.
- Financial reporting.
- Tax compliance.
3. Structured formats
The Order also defines specific formats to ensure automation. These are Structured XML, Facturae (in certain cases), and other interoperable standards. Thus, it eliminates the use of PDFs and manual invoices that do not integrate.
4. Public vs. private platform
The mandatory online invoicing model contemplates two types of platforms:a state public platform or certified private platforms.Companies can choose, but if it is a certified private platform, it will have to offer interoperability, data synchronization, and report to the Administration.
Consequences for CFOs and Financial Departments
Mandatory e-invoicing has strategic consequences across the entire financial landscape. Specifically:
- Automates the Procure-to-Pay (P2P) cycle.
- Reduces manual errors.
- Offers greater control over payments and collections.
- Provides real-time visibility into cash flow.
However, it also presents significant challenges, such as adapting legacysystems, integration with multiple jurisdictions, or simultaneous compliance with international regulations.
What exactly does mandatory e-invoicing require?
On a practical level, the regulation will require the following:
- Issuance of invoices in structured electronic format.
- Mandatory reception of e-invoices.
- Exchange of invoices through interoperable platforms.
- Registration of all invoice statuses.
- Digital preservation of invoices in accordance with tax regulations.
Therefore, it will be necessary for every company (large or small, national or international…) to adapt and work with a solution that complies with this checklist:
- Compatible e-invoicing system.
- ERP integration.
- Real-time reporting capability.
- Connection with external platforms.
- Compliance with technical standards.
Example of the impact of this mandate on a multinational
To be practical, let’s look at an example. Imagine a multinational company that currently has operations in Spain, France, and Germany. Currently:
- Invoices in multiple formats.
- Still works with manual processes in some countries.
- Has low visibility into invoice status.
Now, following the approval of mandatory e-invoicing with this Ministerial Order, you must operate with:
- Centralized system.
- Structured invoices in all countries.
- Synchronized invoice statuses.
- Automatic reporting.
The foreseeable outcome is that you will experience a reduction in DSO (Days Sales Outstanding), a significant improvement in audits and increased operational efficiency.
How to prepare yourself starting now?
Waiting for the definitive approval of the Ministerial Order is a strategic mistake. Companies that get ahead will have a competitive advantage.
To avoid falling behind, from easyap we recommend following these steps.
- Analyze the current state of your invoicing system.
- Identify the gaps against the new requirements.
- Choose a solution compatible with international regulations and interoperable (easyap can be the best decision in these coming months).
- Ensure that your solution integrates with your ERP (SAP, Oracle, etc.).
- Automate your data flows.
- Establish data quality policies.
- Guarantee the traceability of all invoicing.
Be clear that non-compliance with mandatory e-invoicing entails penalties, operational blockages, audit problems, or loss of competitiveness. Internationally, the risk is multiplied by the coexistence of various regulations.
Frequently asked questions about the Ministerial Order for electronic invoicing
Does mandatory e-invoicing apply to international operations?
Yes, provided there is a transaction subject to Spanish B2B regulations. Moreover, many jurisdictions are adopting similar models.
Will it still be possible to use PDF as an invoice?
The PDF may exist as a visual representation, but not as a valid primary format if it is not structured.
What happens if my supplier is not prepared?
The regulations will force all parties to adapt.Interoperability will facilitate the transition, but coordination will be necessary.
Is it mandatory to use the public platform?
No.You may opt for certified private platforms, provided they meet the technical requirements established by law.
The publication of the draft Ministerial Order marks a before and after in the implementation of e-invoicing in Spain.With deadlines already defined and clear technical requirements, the question is whether you are prepared.
For CFOs, it’s a strategic change affecting technology, processes, and compliance. Anticipating it avoids risks and provides efficiency and competitiveness. The objections phase, open until May 8, offers a final window to understand and adjust the strategy. Afterwards, the definitive countdown will begin. At easyap, we help you take the step, so contact usand let’s analyze it together.
